TABLE 3.

Description of the variables obtained from the eye-tracking data.

Type of variable	Number of variables	Description
Fixations	10	Mean number (and standard deviation) of fixations done per situation, and total during the whole VR experience.
Sx_Participant_VirtualAgent	20	Per situation (4×), the average number of times the participant looks at each virtual agent (6×) while the participant is speaking.
Participant_VirtualAgent	5	Over the entire experience, the average time spent by the participant talking, looking at each virtual agent (6×).
Sx_VirtualAgentA_VirtualAgentB	60	Per situation (4×), the average number of times the participant looks at a virtual agent B while virtual agent A is speaking (6×).
VirtualAgentA_VirtualAgentB	15	Over the entire experience, the average number of times the participant looks at a virtual agent B while virtual agent A is speaking.

The environment is considered as another possible area to gaze at while speaking, so the time spent looking at the environment is also calculated as if it were a virtual agent itself.